Interesting look at the plans to remake Penn Station. I agree with the general point that while Penn is an eyesore and confusing to the uninitiated, it's also highly functional, and its multiple entry/exit points are a plus - not just for convenience but safety in the even an evacuation is needed. We should monkey with that for aesthetic purposes at our peril.

Ultimately, the problem with Penn Station is it's ability to handle the volume, not of passengers per se, but of trains themselves. There are only 21 tracks versus 67 at Grand Central Terminal.
I was unaware of the plan to move LIRR trains to GCT. Cost aside, this does make sense.